Class Ia Antiarrhythmics

Check Class Ia Antiarrhythmics Interactions →

5 interactions on record

Class Ia Antiarrhythmics has 5 known drug interactions based on U.S. FDA drug labeling data. Of these, 4 are contraindicated combinations that should be avoided entirely. 1 are classified as major interactions requiring close medical supervision. Notable interactions include combinations with Moxifloxacin, Moxifloxacin Hydrochloride, Moxifloxacin Hydrochloride Tablets, 400 Mg. Patients taking Class Ia Antiarrhythmics should inform their healthcare provider of all current medications — including over-the-counter drugs and supplements — to avoid potentially harmful combinations. Data sourced from OpenFDA and the NIH National Library of Medicine.

Total: 5
Contraindicated: 4
Major: 1

Contraindicated (4)

Class Ia Antiarrhythmics + Moxifloxacin— Concomitant use with Class IA antiarrhythmics may enhance proarrhythmic effects. Avoid concomitant use.
Class Ia Antiarrhythmics + Moxifloxacin Hydrochloride— Proarrhythmic effect may be enhanced. Avoid concomitant use.
Class Ia Antiarrhythmics + Moxifloxacin Hydrochloride Tablets, 400 Mg— Moxifloxacin may enhance proarrhythmic effect. Avoid concomitant use.
Class Ia Antiarrhythmics + Quinine Sulfate— Quinine sulfate prolongs QT interval; concomitant use may cause ECG abnormalities including QT prolongation and Torsades…

Major (1)

Class Ia Antiarrhythmics + Fosfomycin Disodium— Co-administration may increase risk for ventricular arrhythmia due to QT prolongation. Avoid co-administration.

Class Ia Antiarrhythmics + Moxifloxacin⛔Contraindicated

Concomitant use with Class IA antiarrhythmics may enhance proarrhythmic effects. Avoid concomitant use.

Class Ia Antiarrhythmics + Moxifloxacin Hydrochloride⛔Contraindicated

Proarrhythmic effect may be enhanced. Avoid concomitant use.

Class Ia Antiarrhythmics + Moxifloxacin Hydrochloride Tablets, 400 Mg⛔Contraindicated

Moxifloxacin may enhance proarrhythmic effect. Avoid concomitant use.

Class Ia Antiarrhythmics + Quinine Sulfate⛔Contraindicated

Quinine sulfate prolongs QT interval; concomitant use may cause ECG abnormalities including QT prolongation and Torsades de Pointes.

Class Ia Antiarrhythmics + Fosfomycin Disodium⚠️Major

Co-administration may increase risk for ventricular arrhythmia due to QT prolongation. Avoid co-administration.

Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine. For informational purposes only. Always consult your pharmacist or physician.